function checkLoggedIn() 
{ 
    var user = JSON.parse(localStorage.getItem("loggedinUser")); 
 
    //If no one is logged in we send an alert and go to login.html 
    if (!user) { 
        alert("You must log in to see this page."); 
        window.location.href = "../login.html"; 
    } 
 
} 
checkLoggedIn();